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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-25 0:02 |
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Conference: Bucharest University Faculty of Physics 2024 Meeting
Section: Physics Education
Title:
Digital Electricity Experiments with Raspberry Pi
Authors:
Bogdan GHERASIM (1), Ovidiu TOMA (1), Cristina MIRON (1), Ștefan ANTOHE (1,2)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.Box MG-11, Magurele, 077125, Romania
2) Academy of Romanian Scientists, Ilfov Street 3, 050045, Bucharest, Romania
E-mail
bogdangherasim0@gmail.com, santohe@solid.fizica.unibuc.ro
Keywords:
physics education, didactic experiment, Raspberry Pi, Ohm’s Law,
Peltier Effect
Abstract:
Physics is a science with a strong experimental background and that is why didactic experiments are used in the teaching of physics. One of the challenges of the digitization of physics teaching is the digitization of didactic experiments. Raspberry Pi is a small but powerfull single-board computer. It can do all the things you’d expect from a computer, but it also has a GPIO (general-purpose input/output) header that can be used to connect various sensors and other devices. We used the Raspberry Pi connected with different sensors for some didactic experiments related to Ohm’s Law and Peltier Effect. To verify Ohm's law experimentally, we need a Raspberry Pi and two sensors: one for current and one for voltage. Both sensors are analogical and therefore, to connect them to Raspberry Pi, we used the expansion plate Explorer Hat Pro to convert the analog signal into digital signal. Another interesting effect of the electric current is the Peltier effect. In this experiment we used a Peltier element, 2 digital temperature sensors, placed on the two faces of the Peltier element, a current sensor and an analog-to-digital converter to measure the current intensity through the Peltier element. In both experiments we obtained relevant graphs to illustrate the studied phenomena. Using devices like the Raspberry Pi does not cost much and helps us to carry out relevant experiments for the teaching process, in this case experiments for Ohm's Law and the Peltier Effect.
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